Manufacture of substantive polyazo-dyestuffs



Q45 specification there are tobe found, however,

' Passes cost. 27,11931 fPATENTTio F -cE BE l T HQQRD RioriArgDQdi "BASE-L, swrabzmmn; 'AssreNoR 'ro FIRM or J; reGEIGY Q invention relates. tothe inanufacture ton "blue tints of outstandingffastness;to light,

bye up ng hed a -compou Qfafd s ly tu ofithetyp f I zone or naphthalene I sulp'honic or carbok'ylic acid and M and Mg represent 1 theresidue phonic acid, 1-naphthylaminefi sulphonic .1 a i x re oi b th of th h a mono azo-dyestufifobtainable by coupling in acid solution a dia zo body with *2 5+an in0 naphtho'l{Zemonosulphonic acid Thelfnewi dyestuflis probably correspond with the fol l ing f rmu I f are already disclosed inGerinan Patent No.

" 126802. V Amongthenumerous examples and I s. a, orgasm,-

SW TZERLAN MALfiIFAQT UREOFSUBSTANTIVE POLYAZO-DYESTUFFS No Drawing. Application filed November 17,1930, Serial No. 496,336, and Germany November 29, 1929. l

is to say,forange red, yiolet to reddishblue,

.whereasg jthe dyestuffs of the present inventionyield greenish bluegf ints. Incont'rast withthe dyestufis of the German Patent No. M 126802, which all have little fastness to light,

the dyestuffs of the present invention are characterized; by their outstanding fastness tolights v V to .7 r

The following examples illustrate i the, in-

fvention the parts being by weight The diaz o cornpounid froni O 8i'parts of 4- chloro-1-amino-benzene?)-sulphonic' acid is coupled in ac tic acid solution with 2415 parts of sodium 1 naphthylamineW-sulphonate.

The product diazotized further, the diazobody 1s is'olatedand cou led'with2 l f5 parts migtureof these acids in presenceofan' excess of sodium "acetate, The 'dyestufl produced is iisolated,re-dissolvd and again diazotized. The diazo-compoundthus obtained is then introduced into a solution, containing 50 parts of sodium carbonate, of the dyestuff which is obtainable by coupling 17.3 parts of diazotized metanilic acid with 24 parts of 2:5 Z-

amino-naphtholmonosulphonic acid in an r 7, acid solution. When coupling is finished, the whole isheated .and the dyestuff salted out. o It dyes cotton directly greenish-blue ti'ntsof v characteristic fastness to light. 1

,The dyestuffin its free state the following formula: a.

themany dyestuffs named-in the, table of this onlyrepresentatives, in which R soi the dim Instead of 'the -jchloro-Lamin ben eneQ-Q 'sulphonicacid used as initial component, other sulphonic -or corba-Xylic acids ofthe,

benzene or naphthalene, series may be used;

suchasfor examplefimetanilic acid sulphainic I d,: 1ui- 1 91 9 1 d,"nl m lline,

has probably v 1 V I y I tiiitsiobtained ire-premiums ligliflithatf 0f yaluable polyazo-dyestufis which dyezcotof a benzene or naphthalene derivavtive, said dyestuffs dyeing cotton directly said dyestuffs dyeing cotton directlygreenish-blue tints of characteristic fastness to greenish-blue tints ofremarkable fastness to r light. v 7 As new articles of manufacture, thehereinbefore described substantive polyazodyestuffs corresponding probably with the following formula saidd veryfast to light.

myname this ,8. As new articles 10fmainufacturerlthe' hereinbefore described substantive p01yaz0-' dyestuffs corresponding probably with the following formula SOaH COOH 

